1 //! Contains basic data about various HIR declarations.
5 use hir_expand::{name::Name, InFile};
12 item_tree::{AssocItem, ItemTreeId, ModItem},
13 type_ref::{TypeBound, TypeRef},
14 visibility::RawVisibility,
15 AssocContainerId, AssocItemId, ConstId, ConstLoc, FunctionId, FunctionLoc, HasModule, ImplId,
16 Intern, Lookup, ModuleId, StaticId, TraitId, TypeAliasId, TypeAliasLoc,
19 #[derive(Debug, Clone, PartialEq, Eq)]
20 pub struct FunctionData {
22 pub params: Vec<TypeRef>,
23 pub ret_type: TypeRef,
25 /// True if the first param is `self`. This is relevant to decide whether this
26 /// can be called as a method.
27 pub has_self_param: bool,
31 pub visibility: RawVisibility,
35 pub(crate) fn fn_data_query(db: &dyn DefDatabase, func: FunctionId) -> Arc<FunctionData> {
36 let loc = func.lookup(db);
37 let item_tree = db.item_tree(loc.id.file_id);
38 let func = &item_tree[loc.id.value];
40 Arc::new(FunctionData {
41 name: func.name.clone(),
42 params: func.params.to_vec(),
43 ret_type: func.ret_type.clone(),
44 attrs: item_tree.attrs(ModItem::from(loc.id.value).into()).clone(),
45 has_self_param: func.has_self_param,
46 has_body: func.has_body,
47 is_unsafe: func.is_unsafe,
48 is_varargs: func.is_varargs,
49 visibility: item_tree[func.visibility].clone(),
54 #[derive(Debug, Clone, PartialEq, Eq)]
55 pub struct TypeAliasData {
57 pub type_ref: Option<TypeRef>,
58 pub visibility: RawVisibility,
60 /// Bounds restricting the type alias itself (eg. `type Ty: Bound;` in a trait or impl).
61 pub bounds: Vec<TypeBound>,
65 pub(crate) fn type_alias_data_query(
68 ) -> Arc<TypeAliasData> {
69 let loc = typ.lookup(db);
70 let item_tree = db.item_tree(loc.id.file_id);
71 let typ = &item_tree[loc.id.value];
73 Arc::new(TypeAliasData {
74 name: typ.name.clone(),
75 type_ref: typ.type_ref.clone(),
76 visibility: item_tree[typ.visibility].clone(),
77 is_extern: typ.is_extern,
78 bounds: typ.bounds.to_vec(),
83 #[derive(Debug, Clone, PartialEq, Eq)]
84 pub struct TraitData {
86 pub items: Vec<(Name, AssocItemId)>,
91 pub(crate) fn trait_data_query(db: &dyn DefDatabase, tr: TraitId) -> Arc<TraitData> {
92 let tr_loc = tr.lookup(db);
93 let item_tree = db.item_tree(tr_loc.id.file_id);
94 let tr_def = &item_tree[tr_loc.id.value];
95 let name = tr_def.name.clone();
96 let auto = tr_def.auto;
97 let module_id = tr_loc.container.module(db);
98 let container = AssocContainerId::TraitId(tr);
99 let mut expander = Expander::new(db, tr_loc.id.file_id, module_id);
101 let items = collect_items(
105 tr_def.items.iter().copied(),
111 Arc::new(TraitData { name, items, auto })
114 pub fn associated_types(&self) -> impl Iterator<Item = TypeAliasId> + '_ {
115 self.items.iter().filter_map(|(_name, item)| match item {
116 AssocItemId::TypeAliasId(t) => Some(*t),
121 pub fn associated_type_by_name(&self, name: &Name) -> Option<TypeAliasId> {
122 self.items.iter().find_map(|(item_name, item)| match item {
123 AssocItemId::TypeAliasId(t) if item_name == name => Some(*t),
129 #[derive(Debug, Clone, PartialEq, Eq)]
130 pub struct ImplData {
131 pub target_trait: Option<TypeRef>,
132 pub target_type: TypeRef,
133 pub items: Vec<AssocItemId>,
134 pub is_negative: bool,
138 pub(crate) fn impl_data_query(db: &dyn DefDatabase, id: ImplId) -> Arc<ImplData> {
139 let _p = profile::span("impl_data_query");
140 let impl_loc = id.lookup(db);
142 let item_tree = db.item_tree(impl_loc.id.file_id);
143 let impl_def = &item_tree[impl_loc.id.value];
144 let target_trait = impl_def.target_trait.clone();
145 let target_type = impl_def.target_type.clone();
146 let is_negative = impl_def.is_negative;
147 let module_id = impl_loc.container.module(db);
148 let container = AssocContainerId::ImplId(id);
149 let mut expander = Expander::new(db, impl_loc.id.file_id, module_id);
151 let items = collect_items(
155 impl_def.items.iter().copied(),
160 let items = items.into_iter().map(|(_, item)| item).collect();
162 Arc::new(ImplData { target_trait, target_type, items, is_negative })
166 #[derive(Debug, Clone, PartialEq, Eq)]
167 pub struct ConstData {
168 /// const _: () = ();
169 pub name: Option<Name>,
170 pub type_ref: TypeRef,
171 pub visibility: RawVisibility,
175 pub(crate) fn const_data_query(db: &dyn DefDatabase, konst: ConstId) -> Arc<ConstData> {
176 let loc = konst.lookup(db);
177 let item_tree = db.item_tree(loc.id.file_id);
178 let konst = &item_tree[loc.id.value];
181 name: konst.name.clone(),
182 type_ref: konst.type_ref.clone(),
183 visibility: item_tree[konst.visibility].clone(),
188 #[derive(Debug, Clone, PartialEq, Eq)]
189 pub struct StaticData {
190 pub name: Option<Name>,
191 pub type_ref: TypeRef,
192 pub visibility: RawVisibility,
197 pub(crate) fn static_data_query(db: &dyn DefDatabase, konst: StaticId) -> Arc<StaticData> {
198 let node = konst.lookup(db);
199 let item_tree = db.item_tree(node.id.file_id);
200 let statik = &item_tree[node.id.value];
202 Arc::new(StaticData {
203 name: Some(statik.name.clone()),
204 type_ref: statik.type_ref.clone(),
205 visibility: item_tree[statik.visibility].clone(),
206 mutable: statik.mutable,
212 db: &dyn DefDatabase,
214 expander: &mut Expander,
215 assoc_items: impl Iterator<Item = AssocItem>,
216 file_id: crate::HirFileId,
217 container: AssocContainerId,
219 ) -> Vec<(Name, AssocItemId)> {
224 let item_tree = db.item_tree(file_id);
225 let cfg_options = db.crate_graph()[module.krate].cfg_options.clone();
227 let mut items = Vec::new();
228 for item in assoc_items {
230 AssocItem::Function(id) => {
231 let item = &item_tree[id];
232 let attrs = item_tree.attrs(ModItem::from(id).into());
233 if !attrs.is_cfg_enabled(&cfg_options) {
236 let def = FunctionLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
237 items.push((item.name.clone(), def.into()));
240 AssocItem::Const(id) => {
241 let item = &item_tree[id];
242 let name = match item.name.clone() {
246 let def = ConstLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
247 items.push((name, def.into()));
249 AssocItem::TypeAlias(id) => {
250 let item = &item_tree[id];
251 let def = TypeAliasLoc { container, id: ItemTreeId::new(file_id, id) }.intern(db);
252 items.push((item.name.clone(), def.into()));
254 AssocItem::MacroCall(call) => {
255 let call = &item_tree[call];
256 let ast_id_map = db.ast_id_map(file_id);
257 let root = db.parse_or_expand(file_id).unwrap();
258 let call = ast_id_map.get(call.ast_id).to_node(&root);
260 if let Some((mark, mac)) = expander.enter_expand(db, None, call).value {
261 let src: InFile<ast::MacroItems> = expander.to_source(mac);
262 let item_tree = db.item_tree(src.file_id);
264 item_tree.top_level_items().iter().filter_map(ModItem::as_assoc_item);
265 items.extend(collect_items(
275 expander.exit(db, mark);